Answer: I = 0.00383A (approx.)
Explanation:
Using the formula:
B = uni
Where B= magnetic field; 0.160mT
= 0.160 × 10^-2 m/T
n = N/L ; N= 4200 turns,
L =1.25mm = 1.25 × 10^-3m
u = 4π × 10 ^ -7.
Now since magnetic field inside a solenoid is independent of dimension B = uNI/L
I = BL/uN
= 0.00162 × 0.00125 /(4200 × 4π ×10 ^ -7)
I = 0.00384A
Answer:
D: The velocity increases during the time periods labeled A and C
Explanation:
Since gravity pulls us down to Earth, it will pull down the ball faster when the ball is falling.
Answer: C = Q/4πR
Explanation:
Volume(V) of a sphere = 4πr^3
Charge within a small volume 'dV' is given by:
dq = ρ(r)dV
ρ(r) = C/r^2
Volume(V) of a sphere = 4/3(πr^3)
dV/dr = (4/3)×3πr^2
dV = 4πr^2dr
Therefore,
dq = ρ(r)dV ; dq =ρ(r)4πr^2dr
dq = C/r^2[4πr^2dr]
dq = 4Cπdr
FOR TOTAL CHANGE 'Q', we integrate dq
∫dq = ∫4Cπdr at r = R and r = 0
∫4Cπdr = 4Cπr
Q = 4Cπ(R - 0)
Q = 4CπR - 0
Q = 4CπR
C = Q/4πR
The value of C in terms of Q and R is [Q/4πR]
Answer:
Yes, a body with a certain velocity can have an opposite acceleration, the acceleration would then be negative, since it is opposite to the direction to the velocity and also because the direction in which the acceleration is portrayed is on the left-hand side.
Hope this answer helps :)
Statements 1, 3, and 5 are true.
(A, C, and E)
